test(quick-260723-e7i): cover ai-netserver/cosinex bag normalization + DOE regression

- bagRecord() helper builds inline RawTenderRecords for the flat ocdsPayload
  bag shape (no fixtures exist for NetServer/cosinex-DTVP)
- ai-netserver and cosinex-dtvp full-bag mapping, null/empty-field fallback,
  and contentHash-format assertions
- Existing DOE fixture-based assertions untouched, confirming the refactor
  didn't change DOE-path behavior

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/api/src/tenders/tender-normalizer.service.spec.ts

@@ -3,7 +3,7 @@ import { XMLParser } from 'fast-xml-parser';
 import { readFileSync } from 'fs';
 import { join } from 'path';
 import { describe, expect, it } from 'vitest';
-import type { RawTenderRecord } from './tender.types';
+import type { RawTenderRecord, SourceType } from './tender.types';
 import { TenderNormalizerService } from './tender-normalizer.service';
 
 /**
@@ -65,6 +65,36 @@ const NOTICE_WITH_EFORMS_ONLY_DEADLINE =
 const NOTICE_WITH_NO_DEADLINE_OR_VALUE =
   '001c68dd-258a-4bf7-a264-478604ad9c3e-01';
 
+/**
+ * Builds a RawTenderRecord for the flat ocdsPayload-bag scraper adapters
+ * (NetServer/cosinex-DTVP) — no fixture ZIPs exist for these sources, so
+ * the record is constructed inline (gap closure, 13-VERIFICATION.md).
+ */
+function bagRecord(
+  sourceType: SourceType,
+  bag: {
+    title?: string | null;
+    buyerName?: string | null;
+    procedureType?: string | null;
+    legalFramework?: string | null;
+    deadlineAt?: string | null;
+  },
+): RawTenderRecord {
+  const sourcePortal =
+    sourceType === 'cosinex-dtvp' ? 'cosinex-dtvp' : 'tender24';
+  return {
+    sourceType,
+    sourcePortal,
+    sourceNoticeId: 'bag-notice-1',
+    ocid: undefined,
+    sourceUrl: `https://example.invalid/${sourcePortal}`,
+    fetchedAt: new Date(),
+    publishedAt: null,
+    eformsPayload: null,
+    ocdsPayload: bag,
+  };
+}
+
 describe('TenderNormalizerService', () => {
   const service = new TenderNormalizerService();
 
@@ -210,4 +240,81 @@ describe('TenderNormalizerService', () => {
 
     expect(mutated.contentHash).not.toBe(original.contentHash);
   });
+
+  describe('generic ocdsPayload bag (ai-netserver / cosinex-dtvp gap closure)', () => {
+    const fullBag = {
+      title: 'Bauleistung X',
+      buyerName: 'Stadt Y',
+      procedureType: 'Offenes Verfahren',
+      legalFramework: 'VOB/A',
+      deadlineAt: '2026-09-01T10:00:00.000Z',
+    };
+
+    it('ai-netserver: maps the flat bag into NormalizedTenderFields', () => {
+      const raw = bagRecord('ai-netserver', fullBag);
+
+      const normalized = service.normalize(raw);
+
+      expect(normalized.title).toBe('Bauleistung X');
+      expect(normalized.buyerName).toBe('Stadt Y');
+      expect(normalized.procedureType).toBe('Offenes Verfahren');
+      expect(normalized.deadlineAt).toBeInstanceOf(Date);
+      expect(normalized.deadlineAt?.toISOString()).toBe(
+        '2026-09-01T10:00:00.000Z',
+      );
+      expect(normalized.cpvCodes).toEqual([]);
+      expect(normalized.cpvDivisions).toEqual([]);
+      expect(normalized.region).toBeNull();
+      expect(normalized.plz).toBeNull();
+      expect(normalized.bundesland).toBeNull();
+      expect(normalized.estimatedValue).toBeNull();
+      expect(normalized.dedupKey).toBe(`${raw.sourcePortal}:${raw.sourceNoticeId}`);
+      expect(normalized.status).toBe('active');
+    });
+
+    it('cosinex-dtvp: maps an identical bag shape identically', () => {
+      const raw = bagRecord('cosinex-dtvp', fullBag);
+
+      const normalized = service.normalize(raw);
+
+      expect(normalized.title).toBe('Bauleistung X');
+      expect(normalized.buyerName).toBe('Stadt Y');
+      expect(normalized.procedureType).toBe('Offenes Verfahren');
+      expect(normalized.deadlineAt?.toISOString()).toBe(
+        '2026-09-01T10:00:00.000Z',
+      );
+      expect(normalized.cpvCodes).toEqual([]);
+      expect(normalized.cpvDivisions).toEqual([]);
+      expect(normalized.region).toBeNull();
+      expect(normalized.plz).toBeNull();
+      expect(normalized.bundesland).toBeNull();
+      expect(normalized.estimatedValue).toBeNull();
+      expect(normalized.dedupKey).toBe(`${raw.sourcePortal}:${raw.sourceNoticeId}`);
+    });
+
+    it('null/empty bag fields: buyerName/procedureType/deadlineAt stay null, title falls back', () => {
+      const raw = bagRecord('ai-netserver', {
+        title: '',
+        buyerName: null,
+        procedureType: null,
+        legalFramework: null,
+        deadlineAt: null,
+      });
+
+      const normalized = service.normalize(raw);
+
+      expect(normalized.title).toBe('Unbenannte Ausschreibung');
+      expect(normalized.buyerName).toBeNull();
+      expect(normalized.procedureType).toBeNull();
+      expect(normalized.deadlineAt).toBeNull();
+    });
+
+    it('contentHash for a bag source is a stable sha256 (proves shared assemble() reuse)', () => {
+      const raw = bagRecord('ai-netserver', fullBag);
+
+      const normalized = service.normalize(raw);
+
+      expect(normalized.contentHash).toMatch(/^[a-f0-9]{64}$/);
+    });
+  });
 });